Friction joint for window adjusters and the like



Oct. 20 1925- W. R. CARROLL FRI'CTIN JOINT FOR WINDOW ADJUSTERS AND THE LIKE Filed De. 19. 1922 TTORNEY Patented OCP 2n 192.5', 4

UNITED STATES y A 1,551,923 PATENT; OFFICE.

WILLABD B. CARROLL, OF NEW HAVEN, CONNITICUT, ASSIGNOB T THE LYONS MAN- UFACTUBING COMPANY, OF NEW HAVEN, CONNECTICUT, A CORPORATION OF CON- NECTICUT.

FRICTION JOINT FOR WINDOW`LDJUSTERB .AND TK E .LIKE

Application led December 19,1922. Serial No. 807.842.

. To all whom t may comer/n.'

Be it known that VILLABD R. CARROLL, a

citizen of the United States, and resident of New Haven in the county of New Haven 5 and State o Connecticut, has invented certain new and useful Improvements-in Friction Joints for Window Adjusters vand the like, of which the following is a specification.

The present invention relates to window adjusters and the like having two members, one member telescoping' into the other, and means being provided to retain the window adjustersin such position that'the window or the like is held in the full openor partially opened positions. n A

The object of the p resent invention is to improve the previously proposed construction of devices of this class and,- in accordance with the invention, an improved friction joint is produced whereby the friction of the joint between the two members .may be regulated so as to apply the device successfully in practice to windows and the like ofvarious weights or in other instances when the strain on the device is variable.

The improved device is designed and constructed so that it can be readily adj usted to offer a determinable degree of resistance to retard the sliding movement of one member within'the other, or if desired, the device may be tightened to hold the two members in a rigid position.

The improved adjuster is com osed of an inner member and an outer mem er, the inner member telescoping into the outer member, and said members are pivotally oo nnected to brackets, one of whlch is secured to the window, and the other to a fixed point in the usual manner. A friction joint is interposed between said members which permits of a sliding movement of the inner member within the outer member and the degree of frictional retardation to the sliding movement may be varied by adjustment of an external sleeve threaded on the end of the outer member. The joint includes a bushing loosel mounted on the inner member, and this ushing is lrendered elastic or resilient by means of -slitted ends to allow contraction of the same when the adjusting device is tightened, and when said adjusting device 1s loosened, the bushing wil be caused to expand by its own physical propend of the bushin erties and thereby relieve the friction of the jomt as required. i

The improved device will be described more fully hereinafter with reference tothe accompanying drawings whereini Figure l, is an elevation showing the devlce as vapplied to an adjuster for casenxent windows and the like,

Figure 2, is a longitudinal section ofthe I same device considerably enlar ed and,

Figure 3, is a detail view s owing the grlpplngmeans of the improved device.

`Referring to the aforesaid drawings, the complete device as shown comprises two tubular rod sections, one telescoping into the other.` Of these sections, 1 is the outer section, which is connected by a swivel joint 2't0 the,` bracket 3. The other section 4', is pivotally connected at 5 to the bracket 6. The tubular section 1 has the externally threaded end 'which engagesithe internal threads'S of the adjusting sleeve 9. The bore of this sleeve 9 is tapered at 10 and the end of the tube 1 has ka similar tapered bore 11.. The gripping device or bushing 12 1s carried on the tubular rod 4 .and is capable of sliding thereon. The ends of the ushing 12 are tapered at 13 and from either end, on diametrically opposite sides, the bushing is slotted at 14 so that the bushing ma be contracted under pressure imparted y adjustment of the sleeve 9.

In such instances where it is desired that one section should not be completely with` drawn from the other, the inner section is provided with a stop consisting of a washer 15 which is held on the end of this section by screw 16. In the extreme outward position of the sectionl said stop engages the 12. A washer 17 is interposed between t e end of the bushing 12 and the tapered seat 10 in the upper end 'of the adjusting sleeve 9 so as to provide means to take the wear from the end of the bushing 12. Y.

It has been found in practice vthat the bushing 12 performs its functions better when it is composed of a non-abrasive metal alloy such for example, as a comparatively har anti-friction metal which is more or less elastic and may therefore be more v readily compressed, and at the same time,

its origipal shape.

In the operation of the improved device, as applied to window adusters or any other instance where one mem r telescopes within another', the sections are drawn out to the determined position and then if a permanent adjustment is required, the adjusting sleeve is ti htened to the full. extent so that the tapere ends of the bushing 12 are tightly forced into the correspondingly tapered seats 10 and 11. The bushing 12 is thus compressed so as to tightly en age the rod or tube 4. When it is desire to adjust the sections 1 and 4 so asto slide against retardation the sleeve is tightened accordin to the e ree of resistance desired an when the joint becomes loose from wear on the bushing, the sleeve 9 may be readjusted to maintain the resistance at' the required degree.

It will be noted that one of the chief advantages of the improved device is attained by having both ends of the Agripping bushing tapered and en agin their respective seats,lso that when t e adjusting sleeve is tightened, both ends of the bushing are contracted whereby the ripping surface is considerably increasedg, and thus a more effectual gri ping or binding action is obtained, than eretofore obtained with deviceskwherein only one' end of the gripping 30 device is engaged.

It will be understood, when the requirements can be met with a `split bushin having only one end tapered, it would facilitate manufacture if the tapered seat in the end a5 of the tube 1 is eliminated and in this case, the re uired com ression of the bushing would e obtain through enga ement of the single tapered end of the busing with the tapered seat in the sleeve 9. 40

I claim:

In a. device as described, a tubular body;

a member adapted to slide within said body; adjustable friction means interposed between said body and member; said means compris- 45 ing an external nut mounted on a threaded end of said body; a contractible and selfexpandin bushing slidably mounted on said mem er; said ushing having a tapered end engaging a tapered seat whereb con- 5o traction of said bushing is eieote' and means provided on the inner end of 'said member arranged to engage said bushin to limit the outward movement of said mem i'.

Signed at New Haven, in the county of 65 New Haven, and State of Connecticut this 15th day of December A. D. 1922.

WILLARD R. CARROLL. 

